He was shot down on a reconnaissance mission to photograph the German battleships Scharnhorst and Gneisenau at Brest, 15 August 1941.[4] He was wounded in the leg and quickly captured by the Germans, becoming a prisoner of war.

His first escape attempt came on 1 December 1941, when he was recovering from a leg wound sustained when he was shot down. He escaped from a hospital at Stadtroda, however was recaptured three days later attempting to cross the Dutch-German border.[5]

His next attempt was from Stalag IX-C at Bad Sulza on 21 January 1942. He exchanged identity with a Canadian POW and joined in with a work party. He managed to slip away unnoticed when outside the camp. After travelling some distance by train to Werwitz, he continued on foot, through deep snow towards the German-Belgian frontier where he was eventually captured five days later, suffering from extreme exhaustion and exposure.[5][6]

Following a brief period in hospital, he was transferred to Oflag VI-B at Warburg.

At Warburg, he participated in the construction of an escape tunnel, which was completed on 18 April 1942. He, and 34 others (including the legless air ace Douglas Bader and Dowse's later escaping partner Stanislaw Krol) prepared to escape. However, as the tunnel broke the surface, it became clear that it was slightly too short, and the exit appeared in the beat of a German sentry. Six RAF officers managed to escape, but due to the close proximity of the sentry, no one else, including Dowse, was able to escape.[7]

Dowse's next escape attempted happened on 30 November 1942, when he, and Flt LtStanisław 'Danny' Krol cut through the wire into the centre compound and crawled across that compound using blankets as camouflage. They were in the process of cutting the wire to get out when they were arrested and sentenced to 14 days solitary confinement.[8]

Dowse, who spoke some German, befriended a German corporal who worked alongside Dowse in the camp′s censor office. From this contact, Dowse was able to gain useful information and documents which aided the escape organisation. He was able to 'borrow' a genuine gate pass, which was copied by the camp's forgery department, and a copy was used on the delousing break mass escape in June 1943.[9]

Through this same contact, Dowse was able to gain information about the German secret rocket establishment at Peenemünde. This information was passed onto British intelligence via secret codes written into POWs' letters home.[10]

He also learnt that the Gestapo had plans for Roger Bushell if he were caught escaping again. Dowse warned Bushell, who chose to ignore the warning.[11]

During his time in the North Compound at Stalag Luft III, Dowse became involved with the construction of the three tunnels intended for a mass escape, masterminded by Roger Bushell, Harry Day and Canadian Wally Floody who was instrumental in the tunnel′s design and construction. One tunnel, code named 'Harry' which Dowse had helped build, was completed in early 1944.

On 24 March 1944 he took part in the The Great Escape through tunnel 'Harry', escaping with Flt LtStanisław 'Danny' Krol. He had drawn escape number 21, and was disguised as a Danish foreign worker, equipped with the appropriate (forged) documents and clothing provided by his 'contact'.[12]

They travelled mainly by foot towards the Polish border, but were recaptured just inside Germany on 6 April 1944. They were one of the last escapers to be recaught. Taken to the local Gestapo headquarters they were interrogated, before being separated.[13]

At Sachsenhausen, he found himself with 3 other survivors of the 'Great Escape' (Harry Day, Johnnie Dodge and Bertram James) and was placed in Sonderlager A (Special Camp A) within the main camp. Here were housed a handful of other 'political' prisoners, including SOE agent Peter Churchill, two Russian generals, various other Russians, Poles, Italians and four British soldiers of Irish origin.[14] Later they were joined by British CommandoJack Churchill.

Dowse and James almost immediately began another tunnel, which was kept secret from all non-British personnel. This was completed and used on the night of 23 September 1944, when Dowse, James, Day, Dodge and Jack Churchill escaped.[15][16]

He paired up with Day, and they travelled by train into Berlin; however, they were recaptured the next night when hiding in a bombed out house.[17]

Placed in the death cells back at Sachsenhausen, all the escapers who had been recaught were spared execution mainly thanks to Day's efforts under interrogation.

In April 1945, after spending several months in solitary confinement he, together with other prominent prisoners, was transferred to Tyrol via concentration camps at Flossenburg and Dachau.

Dowse served as an equerry at Buckingham Palace. For a number of years in the 1950s, at the time of the communist insurgency, he worked in Malaya as a rubber plantation manager in the Penang Settlement.[18] After the war, he worked, possibly unwittingly, for a short time as a representative for Bernie Cornfeld's insurance fraud "The Dover Plan" as well as other unsuccessful and/or dubious ventures. He lived mainly on his heroic stories from the war, which were a laissez passer in post-war society.

He married three times, for the most part to women of some fortune but was single at the time of his death. (He married Florence Marion Byers, daughter of wealthy businessman and Liberal, C. Charles Byers, then ran off, in 1968, with "Wings Day"'s wife, to his former superior officer's eternal chagrin.)[citation needed]

In retirement Dowse divided his time between elegant homes in Chelsea and Monte Carlo.

He returned to Stalag Luft III in March 1994, and March 2004 to mark the anniversaries of the Great Escape, and to commemorate his friends who did not survive.[18][19]